'Chitin' definitions:
Definition of 'chitin'
(from WordNet)
noun
A tough semitransparent horny substance; the principal component of the exoskeletons of arthropods and the cell walls of certain fungi
Definition of 'Chitin'
From: GCIDE
- Chitin \Chi"tin\, n. [See Chiton.] (Chem.) A white amorphous horny substance forming the harder part of the outer integument of insects, crustacea, and various other invertebrates; entomolin. [1913 Webster]